Where does “unsittable” come from?

unsittable (English) comes from English sittable, from English -able, from Middle English -able, from Old French -able, from Latin -ābilis — suffixed to noun to form adjectives meaning "able to have or bring, prone to have or bring, having the power to have or bring": -able.

unsittable (English): Unable to be sat on; Unpleasant to sit on;...

Definitions

  1. Unable to be sat on; Unpleasant to sit on;...

Ancestry of “unsittable”, step by step

unsittable traces back through two separate lines of ancestry.

via English sittable

StepLanguageWordMeaning
1EnglishsittableAble to be sat on
2English-ableAn adjectival suffix; forms adjectives meaning
3Middle English-ableable
4Old French-ableworthy of, deserving of; -ing, creating an...
5Latin-ābilissuffixed to noun to form adjectives meaning "able to have or bring, prone to have or bring, having the power to have or bring": -able

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Latin -ābilis